Yeah. If I was to guess "SEJ" is Steven E. Jones. Utah corporate name search yields nothing and there's a fee for searching by owner. Many states don't require one to register a dba if it's your legal name or a form of it. My guess is Jones used his initials as a dba for his bogus company. But did it in a way that was purposefully misleading; anyone would assume, in the context of the paper, it was a legit company or lab unconnected to the authors. That is, at the least, deceptive and unethical.